Fresh air equipment

Abstract

The utility model relates to the technical field of air conditioning, and provides fresh air equipment which comprises a shell, a heat exchange core, a fresh air fan and an exhaust fan, and the heat exchange core is located in the shell and extends in the first direction; the fresh air fan is located in the shell. The fresh air fan is located in the shell, the exhaust fan is located in the shell, the fresh air fan and the exhaust fan are arranged in the second direction and located on the same side of the heat exchange core in the first direction, and the first direction is perpendicular to the second direction. The fresh air fan and the exhaust fan are both located on the same side of the heat exchange core in the first direction, the fresh air fan and the exhaust fan cannot increase the size of the shell in the first direction, and the fresh air fan, the exhaust fan and the heat exchange core are compact in structure. The fresh air fan and the exhaust fan are arranged in the second direction, the space of the shell in the second direction is fully utilized, the space of the shell in the first direction and the space of the shell in the second direction are comprehensively considered, and therefore the overall size of the fresh air equipment is reduced, and the miniaturization requirement is met.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to a fresh air device. Background Art

[0002] This section is intended to provide a background or context for the embodiments of the present application. No description herein is admitted to be prior art by virtue of its inclusion in this section.

[0003] Fresh air equipment can be used to transport outdoor air into the room and discharge indoor air to the outside. In the related art, fresh air equipment is large in size and requires a large installation space. It is usually suitable for indoor environments such as large spaces and large-sized houses. It is difficult to install fresh air equipment in relatively small spaces such as bathrooms, kitchens or small-sized houses, which limits the application of fresh air equipment. There is a trend of miniaturization of fresh air equipment to adapt to more application scenarios. Utility Model Content

[0004] In view of this, the present application hopes to provide a fresh air device with a compact structure to meet the miniaturization requirements.

[0005] The embodiment of the present application provides a fresh air device, including:

[0006] shell;

[0007] A heat exchange core is located in the shell, and the heat exchange core extends along a first direction;

[0008] A fresh air fan is located in the housing;

[0009] The exhaust fan is located in the shell, the fresh air fan and the exhaust fan are arranged along the second direction, and are both located on the same side of the heat exchange core along the first direction, and the first direction and the second direction are perpendicular to each other.

[0010] In some embodiments, two side walls of the shell opposite to each other along the second direction are respectively formed with a return air inlet and a fresh air inlet, and the circumferential surface of the heat exchange core surrounding the first direction includes a return air inlet surface and a fresh air inlet surface, and the return air inlet surface is located on the side of the fresh air inlet surface close to the return air inlet.

[0011] In some embodiments, the fresh air inlet surface is inclined toward the fresh air outlet.

[0012] In some embodiments, the fresh air device includes a partition, which defines the space in the outer shell into a heat exchange chamber and a fan chamber, the fan chamber is located on one side of the heat exchange chamber along the first direction, the heat exchange core is located in the heat exchange chamber, and the fresh air fan and the exhaust fan are both located in the fan chamber.

[0013] In some embodiments, the partition includes a partition plate, which connects the heat exchange core and the return air outlet to separate the heat exchange chamber into a return air channel and a supply air channel, the return air channel is located on the first side of the supply air channel along the third direction, and the return air inlet surface is a partial surface of the return air channel, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0014] In some embodiments, the circumferential surface of the heat exchange core surrounding the first direction includes an air supply outlet surface, the air supply outlet surface is opposite to the fresh air inlet surface, and the air supply outlet surface is a partial surface of the air supply channel.

[0015] In some embodiments, the fan cavity includes an air supply chamber located on one side of the air supply channel along the first direction, the fresh air fan is located in the air supply chamber, and the air supply chamber is connected to the air supply channel.

[0016] In some embodiments, the partition includes an isolation plate, which is connected to the heat exchange core and the fresh air outlet to separate the heat exchange chamber into a fresh air channel and an exhaust air channel, the fresh air channel is located on the first side of the exhaust air channel along the third direction, and the fresh air inlet surface is a partial surface of the fresh air channel, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0017] In some embodiments, the circumferential surface of the heat exchange core surrounding the first direction includes an exhaust outlet surface, the exhaust outlet surface is opposite to the return air inlet surface, and the exhaust outlet surface is a partial surface of the exhaust channel.

[0018] In some embodiments, the fan cavity includes an exhaust chamber located on one side of the exhaust channel along the first direction, the exhaust fan is located in the exhaust chamber, and the exhaust chamber is connected to the exhaust channel.

[0019] In some embodiments, a side wall of the shell along the second direction is formed with a return air inlet and a supply air inlet, and another side wall of the shell along the second direction is formed with a fresh air inlet and an exhaust air inlet, the airflow outlet of the fresh air fan is connected to the supply air inlet, and the airflow outlet of the exhaust fan is connected to the exhaust air inlet.

[0020] In some embodiments, the fresh air device includes a control device disposed outside the housing, and the control device is located on a side wall of the housing along the second direction.

[0021] In some embodiments, the circumferential surface of the heat exchange core surrounding the first direction includes a return air inlet surface, a fresh air inlet surface, an exhaust air outlet surface and a supply air outlet surface, the exhaust air outlet surface is opposite to the return air inlet surface, the supply air outlet surface is opposite to the fresh air inlet surface, and the return air inlet surface, the fresh air inlet surface, the exhaust air outlet surface and the supply air outlet surface are connected in sequence.

[0022] In some embodiments, an inner surface of the shell along the third direction is a bearing surface, the exhaust outlet surface faces the bearing surface, and the angle between the exhaust outlet surface and the bearing surface is α, 15°≤α≤30°, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0023] In some embodiments, the axis of the fresh air fan and the axis of the exhaust air fan both extend along a first direction.

[0024] In the fresh air device provided by the embodiment of the present application, if the fresh air fan and the exhaust fan are located on different sides of the heat exchange core along the first direction, the fresh air fan and the exhaust fan respectively occupy the space in the shell along the first direction, causing the size of the shell along the first direction to increase; while if the fresh air fan and the exhaust fan are both located on the same side of the heat exchange core along the first direction, the fresh air fan and the exhaust fan will not increase the size of the shell along the first direction respectively, and the fresh air fan, the exhaust fan and the heat exchange core have a compact structure. The fresh air fan and the exhaust fan are arranged along the second direction, making full use of the space of the shell along the second direction, and comprehensively considering the space of the shell along the first direction and the second direction, thereby reducing the overall size of the fresh air device and meeting the miniaturization requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural schematic diagram of a fresh air device in one embodiment of the present application;

[0026] Figure 2 for Figure 1 A schematic diagram of another perspective of the fresh air device with some structures omitted, wherein the first airflow path X1 is the indoor airflow path, and the second airflow path X2 is the outdoor airflow path;

[0027] Figure 3 for Figure 1 A partial cross-sectional schematic diagram of a medium fresh air device, wherein the dotted arrows schematically show the flow directions of the indoor airflow and the outdoor airflow in the heat exchange core;

[0028] Figure 4 for Figure 1 Schematic diagram of part of the structure of the new wind equipment;

[0029] Figure 5 A schematic diagram of a partial structure of a housing and a partition in an embodiment of the present application;

[0030] Figure 6 It is a schematic diagram of the structure of a separator in one embodiment of the present application;

[0031] Figure 7 for Figure 6 a schematic diagram of another perspective of the illustrated divider;

[0032] Figure 8 for Figure 1 Another partial cross-sectional view of the fresh air device is shown, in which the dotted arrow schematically shows the flow direction of the outdoor air flow in the air supply channel.

[0033] Description of Reference Numerals

[0034] Shell 1; return air outlet 1a; fresh air outlet 1b; supply air outlet 1c; exhaust air outlet 1d; bearing surface 1e; heat exchange chamber 10a; return air channel 101a; supply air channel 102a; fresh air channel 103a; exhaust air channel 104a; fan chamber 10b; supply air chamber 101b; exhaust air chamber 102b; heat exchange core 2; return air inlet surface 2a; fresh air inlet surface 2b; supply air outlet surface 2c; exhaust air outlet surface 2d; fresh air outlet Machine 3; exhaust fan 4; partition 5; partition plate 51; guide plate body 511; return air guide surface 511a; recessed area 511aa; protruding area 511ab; transition area 511ac; guide plate body 512; bearing plate body 513; folding plate body 514; isolation plate 52; guide slope 52a; partition plate 53; air expansion plate 54; control device 6; return air filter 7; fresh air filter 8; connecting flange 9. DETAILED DESCRIPTION

[0035] In the absence of conflict, the embodiments and technical features in the embodiments of the present application may be combined with each other, and the detailed descriptions in the specific implementation methods should be understood as explanations of the purpose of the present application and should not be regarded as improper limitations on the present application.

[0036] It should be noted that, in the embodiments of the present application, down refers to the direction where the ground is located, and up is opposite to down; the first direction, the second direction and the third direction are three-dimensional vertical coordinate systems that are perpendicular to each other, and the first side of the third direction and the second side of the third direction are two opposite directions. In the embodiments of the present application, the orientation or position relationship of "first direction", "second direction" and "third direction" is based on the orientation or position relationship shown in the accompanying drawings. It should be understood that these orientation terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that in the embodiments of the present application, multiple includes a quantity of two and more than two.

[0037] The overall size of the fresh air equipment in the related art is relatively large, the overall machine is heavy, and the installation space for installing the fresh air equipment is limited. For example, the fresh air equipment is usually only suitable for large-sized houses and / or scenes with large balcony ceiling space. In addition, the overall size of the fresh air equipment in the related art is relatively large, resulting in a small maintenance space, making the fresh air equipment inconvenient to maintain and increasing the difficulty of after-sales maintenance. If the overall size of the fresh air equipment is reduced, the size of the heat exchange core and / or air duct of the fresh air equipment will be reduced, resulting in reduced heat exchange efficiency. The reduction in the size of the various components of the air duct causes the air path to change dramatically, resulting in performance problems such as large pressure loss, small air volume, high energy consumption, and high noise. In some cases, the overall size of the fresh air equipment in the related technology is large, and the plates used to isolate the air ducts in the fresh air equipment are flat-shaped. The flat-shaped plates are usually perpendicular to the chassis of the outer shell. The plates isolating the air ducts do not have the function of guiding air, and will also cause the air ducts to include many 90° turns, increasing the useless area in the outer shell and causing space waste in the outer shell; the direction of indoor air flow and outdoor air flow is usually curved, and therefore, eddy currents will appear at the intersection corners of each plate and the chassis, such as 90° turns, affecting the heat exchange efficiency and increasing the pressure loss of the entire heat exchange process. The unsmooth air path of the air flow will also increase the motor load of the fresh air equipment, thereby increasing the speed, and increasing the machine noise and vibration.

[0038] See also Figure 1 and Figure 2 The embodiment of the present application provides a fresh air device, which includes a housing 1, a heat exchange core 2, a fresh air fan 3 and an exhaust fan 4. The heat exchange core 2 is located in the housing 1, and the heat exchange core 2 extends along a first direction. The fresh air fan 3 and the exhaust fan 4 are both located in the housing 1. The fresh air fan 3 and the exhaust fan 4 are arranged along a second direction, and are both located on the same side of the heat exchange core 2 along the first direction, and the first direction and the second direction are perpendicular to each other.

[0039] The extension of the heat exchange core 2 along the first direction means that the airflow enters or flows out of the heat exchange core 2 from the circumference surrounding the first direction. For example, the extension of the heat exchange core 2 along the first direction may be that a plurality of heat exchange medium sheets of the heat exchange core 2 are stacked at intervals along the first direction. The heat exchange medium sheets are used for heat exchange between indoor airflow and outdoor airflow. An interval space is formed between two adjacent heat exchange medium sheets. The two adjacent interval spaces can flow indoor airflow and outdoor airflow respectively, and the indoor airflow and the outdoor airflow exchange heat through the heat exchange medium sheets. In other words, the indoor airflow and the outdoor airflow enter and exit the heat exchange core 2 from the circumference surrounding the first direction of the heat exchange core 2. The heat exchange medium sheets can be used for heat exchange but not for circulating airflow.

[0040] Indoor air flow is usually called return air, and outdoor air flow is usually called fresh air. The fresh air fan 3 drives the fresh air to flow, that is, drives the outdoor air flow, and the exhaust fan 4 drives the return air to flow, that is, drives the indoor air flow.

[0041] The fresh air fan 3 drives the outdoor air flow to flow through the heat exchange core 2, and the exhaust fan 4 drives the indoor air flow to flow through the heat exchange core 2. The indoor air flow and the outdoor air flow exchange heat in the heat exchange core 2 to achieve heat recovery and adjust the temperature and / or humidity of the outdoor air flow entering the room. The fresh air equipment realizes the fresh air function and the exhaust function. The fresh air function is the function of outdoor fresh air entering the room, and the exhaust function is the function of indoor dirty air being discharged to the outside.

[0042] In the fresh air device provided by the embodiment of the present application, if the fresh air fan 3 and the exhaust air fan 4 are located on different sides of the heat exchange core 2 along the first direction, the fresh air fan 3 and the exhaust air fan 4 respectively occupy the space in the housing 1 along the first direction, causing the size of the housing 1 along the first direction to increase; while the fresh air fan 3 and the exhaust air fan 4 are both located on the same side of the heat exchange core 2 along the first direction, the fresh air fan 3 and the exhaust air fan 4 will not increase the size of the housing 1 along the first direction respectively, and the fresh air fan 3, the exhaust air fan 4 and the heat exchange core 2 have a compact structure. The fresh air fan 3 and the exhaust air fan 4 are arranged along the second direction, making full use of the space of the housing 1 along the second direction, and comprehensively considering the space of the housing 1 along the first direction and the second direction, thereby reducing the overall size of the fresh air device and meeting the miniaturization requirements.

[0043] The fresh air device provided in the embodiment of the present application can be installed on the ceiling or ceiling panel. The ceiling panel can separate the indoor space into a ceiling space and a living space. Users carry out their daily lives in the living space, and the ceiling space is not only used to beautify the interior decoration, but also to install other equipment. In one embodiment, the fresh air device is arranged in the ceiling space. In this way, the fresh air device is hidden in the ceiling space, avoiding the user from directly observing the entire fresh air device, thereby improving the visual aesthetics. It is understandable that the indoor space includes but is not limited to balconies, bathrooms, kitchens, etc., and can be a large-sized house, a small-sized house, or other types of production or living environments.

[0044] When the fresh air device provided in the embodiment of the present application is installed on the ceiling or ceiling board, the third direction can be consistent with the up-down direction, the first side of the third direction can be the bottom, and the second side of the third direction can be the top. Taking the shell 1 as an example of being roughly hexahedral, the third direction can be the thickness direction of the shell 1, one of the first direction and the second direction can be the width direction of the shell 1, and the other of the first direction and the second direction can be the length direction of the shell 1. Taking the installation of the fresh air device in the ceiling space as an example, the size of the ceiling space along the up-down direction is much smaller than the size of the ceiling space along the first direction and the second direction, and the thickness direction of the shell 1 is along the up-down direction, which can avoid the problem of the fresh air device being difficult to install in the ceiling space.

[0045] If the heat exchange core extends along the third direction, that is, multiple heat exchange medium sheets are stacked along the third direction, the thickness of the shell along the vertical direction will be greatly increased, making it difficult to fit the whole machine into an installation space with a smaller size along the vertical direction. If the size of the heat exchange core along the third direction is reduced in order to adapt to the installation space with a smaller size along the vertical direction, the number of heat exchange medium sheets will be too small or the spacing will be too small, resulting in poor heat exchange effect.

[0046] In the present application, the heat exchange core 2 extends along the first direction, so that the size of the heat exchange core 2 along the first direction can be larger and will not affect the thickness of the shell 1 along the up and down directions. In this way, the thickness of the shell 1 along the up and down directions can be designed as needed without affecting the heat exchange efficiency, which not only meets the installation requirements but also takes into account the heat exchange requirements.

[0047] In one embodiment, please refer to Figure 2 and Figure 8 , the axis of the fresh air fan 3 and the axis of the exhaust air fan 4 both extend along the first direction.

[0048] The larger the radial dimensions of the fresh air fan 3 and the exhaust air fan 4 are, the larger the air volume of the fresh air fan 3 and the exhaust air fan 4 is; conversely, the smaller the radial dimensions of the fresh air fan 3 and the exhaust air fan 4 are, the smaller the air volume of the fresh air fan 3 and the exhaust air fan 4 is. Taking the third direction as being consistent with the up-down direction as an example, if the axes of the fresh air fan 3 and the exhaust air fan 4 are along the third direction, that is, the fresh air fan 3 and the exhaust air fan 4 are arranged on the chassis of the housing 1 along the third direction in a manner similar to lying, increasing the radial dimensions of the fresh air fan 3 and the exhaust air fan 4 will cause the size of the whole machine to be too large. If the radial dimensions of the fresh air fan 3 and the exhaust air fan 4 are reduced in order to reduce the size of the whole machine, the air volume of the fresh air fan 3 will be too small. In other words, the fresh air fan 3 and the exhaust air fan 4 are arranged on the chassis of the housing 1 along the third direction in a manner similar to lying. When the radial dimensions of the fresh air fan 3 and the exhaust air fan 4 are large, the size of the housing 1 along the first direction will be excessively increased, which is not conducive to product miniaturization.

[0049] In this embodiment, the axis of the fresh air fan 3 and the axis of the exhaust fan 4 both extend along the first direction. When the radial dimensions of the fresh air fan 3 and the exhaust fan 4 are large, the fresh air fan 3 and the exhaust fan 4 will not excessively increase the dimension of the whole machine along the first direction, thereby reducing the volume occupied by the fresh air fan 3 and the exhaust fan 4, making the structural layout more reasonable and the whole machine smaller.

[0050] It can be understood that the axial direction and radial direction of the fresh air fan 3 are perpendicular to each other, and the axis of the fresh air fan 3 is a straight line extending along the axial direction. The axial direction and radial direction of the exhaust fan 4 are perpendicular to each other, and the axis of the exhaust fan 4 is a straight line extending along the axial direction.

[0051] In some embodiments, the fresh air fan 3 and the exhaust air fan 4 are both centrifugal fans. Exemplarily, the centrifugal fan includes a fan housing and a wind wheel, and the wind wheel is located in the fan housing. The wind wheel rotates to drive the airflow, and the fan housing plays a guiding role. The axis of the wind wheel and the axis of the fan housing can both extend in the first direction, so that increasing the radial size of the wind wheel and the fan housing will basically not increase the size of the housing 1 in the first direction.

[0052] In one embodiment, the fan casing is a volute casing.

[0053] In one embodiment, the fan housing is provided with air inlets on both sides along the first direction, and the fan housing is provided with air outlets on a circumferential surface surrounding the first direction. The airflow enters the fan housing axially through the two air inlets and then flows out through the air outlets.

[0054] In one embodiment, please refer to Figure 1 and Figure 2 The two side walls of the housing 1 opposite to each other along the second direction are respectively formed with a return air port 1a and a fresh air port 1b, and the circumferential surface of the heat exchange core 2 surrounding the first direction includes a return air inlet surface 2a and a fresh air inlet surface 2b, and the return air inlet surface 2a is located on the side of the fresh air inlet surface 2b close to the return air port 1a. Specifically, the fresh air inlet surface 2b is located on the side of the return air inlet surface 2a close to the fresh air port 1b.

[0055] The return air port 1a is used to introduce indoor air flow into the housing 1. The fresh air port 1b is used to introduce outdoor air flow into the housing 1.

[0056] Indoor air flows into the heat exchange core 2 through the return air inlet surface 2a, and outdoor air flows into the heat exchange core 2 through the fresh air inlet surface 2b.

[0057] In this embodiment, the indoor airflow from the return air outlet 1a enters the heat exchange core 2 through the return air inlet surface 2a, and the outdoor airflow from the fresh air outlet 1b enters the heat exchange core 2 through the fresh air inlet surface 2b. The indoor airflow and the outdoor airflow enter the heat exchange core 2 from two opposite sides of the second direction respectively. On the one hand, the return air outlet 1a and the return air inlet surface 2a are opposite to each other, and the fresh air outlet 1b and the fresh air inlet surface 2b are opposite to each other, which can reduce the 90° turn in the airflow process, make the air path smoother, reduce eddy currents and the generated wind noise, and has the characteristics of large air volume, low energy consumption and low noise; on the other hand, it can extend the heat exchange time of the indoor airflow and the outdoor airflow in the heat exchange core 2, thereby improving the heat exchange efficiency.

[0058] In one embodiment, please refer to Figure 3 The included angle between the return air inlet surface 2a and the plane where the return air outlet 1a is located is an acute angle. In other words, the return air inlet surface 2a is inclined toward the return air outlet 1a. In this way, it is convenient for the indoor airflow from the return air outlet 1a to smoothly enter the return air inlet surface 2a.

[0059] In one embodiment, please refer to Figure 3 , the fresh air inlet surface 2b is inclined toward the fresh air outlet 1b. That is to say, the angle between the fresh air inlet surface 2b and the plane where the fresh air outlet 1b is located is an acute angle. In this way, it is convenient for the indoor air flow from the fresh air outlet 1b to smoothly enter the fresh air inlet surface 2b.

[0060] In one embodiment, please refer to Figure 1 and Figure 2 A return air port 1a and an air supply port 1c are formed on one side wall of the shell 1 along the second direction, a fresh air port 1b and an exhaust air port 1d are formed on the other side wall of the shell 1 along the second direction, the air flow outlet of the fresh air fan 3 is connected to the air supply port 1c, and the air flow outlet of the exhaust fan 4 is connected to the exhaust air port 1d.

[0061] The air supply port 1c is used to guide the outdoor air flow in the housing 1 out of the housing 1. The air exhaust port 1d is used to guide the indoor air flow in the housing 1 out of the housing 1.

[0062] For ease of description, the two side walls of the housing 1 opposite to each other along the second direction are defined as the first side wall and the second side wall, for example, the return air inlet 1a and the supply air inlet 1c can be formed on the first side wall, and the fresh air inlet 1b and the exhaust air inlet 1d can be formed on the second side wall. The return air inlet 1a and the fresh air inlet 1b are located on both sides of the heat exchange core 2 along the second direction, and the supply air inlet 1c and the exhaust air inlet 1d are located on both sides of the fresh air fan 3 and the exhaust air fan 4 along the second direction.

[0063] In this embodiment, the return air inlet 1a and the fresh air inlet 1b are located on both sides of the heat exchange core 2 along the second direction, and the supply air inlet 1c and the exhaust air inlet 1d are located on both sides of the fresh air fan 3 and the exhaust air fan 4 along the second direction. On the one hand, it is convenient for the return air inlet 1a, the supply air inlet 1c, the fresh air inlet 1b and the exhaust air inlet 1d to be externally connected to the air duct to avoid interference between the air duct and the ceiling panel and the ceiling, and it can also avoid the problem of too large size caused by the formation of the above-mentioned air outlets on more than two side walls of the outer shell 1; on the other hand, the indoor airflow and the outdoor airflow flow smoothly in the outer shell 1, which can reduce eddy currents.

[0064] In one embodiment, please refer to Figure 1 and Figure 2 The fresh air device includes a control device 6 disposed outside the housing 1, and the control device 6 is located on a side wall of the housing 1 along the second direction. For example, the control device 6 can be disposed on the first side wall or the second side wall.

[0065] The control device 6 can be used to control at least one control function of the fresh air device, such as starting, stopping and mode selection.

[0066] The return air outlet 1a, the supply air outlet 1c, the fresh air outlet 1b and the exhaust air outlet 1d are provided with a connecting flange 9, and the air duct is externally connected to the connecting flange 9, and the control device 6 is set on a side wall along the second direction. In this way, the control device 6 is prevented from occupying the space inside the outer shell 1, and the control device 6 can also be prevented from increasing the size of the first direction or the third direction.

[0067] In one embodiment, please refer to Figure 1 In the second direction, the control device 6 does not protrude from the pipe flange 9 on the same side thereof. In this way, the control device 6 does not increase the size of the whole machine along the second direction.

[0068] In one embodiment, please refer to Figure 1 and Figure 2 , the control device 6 is located between the return air port 1a and the supply air port 1c. In another embodiment, the control device 6 is located between the fresh air port 1b and the exhaust air port 1d.

[0069] In one embodiment, please refer to Figure 3 The circumferential surface of the heat exchange core 2 surrounding the first direction includes a return air inlet surface 2a, a fresh air inlet surface 2b, an exhaust air outlet surface 2d and a supply air outlet surface 2c. The exhaust air outlet surface 2d is opposite to the return air inlet surface 2a, and the supply air outlet surface 2c is opposite to the fresh air inlet surface 2b. The return air inlet surface 2a, the fresh air inlet surface 2b, the exhaust air outlet surface 2d and the supply air outlet surface 2c are connected in sequence.

[0070] The outdoor air flow before heat exchange enters the heat exchange core 2 through the fresh air inlet surface 2b, and the outdoor air flow after heat exchange flows out of the heat exchange core 2 through the air supply outlet surface 2c.

[0071] The indoor air flow before heat exchange enters the heat exchange core 2 through the return air inlet surface 2a, and the indoor air flow after heat exchange flows out of the heat exchange core 2 through the exhaust air outlet surface 2d.

[0072] The return air inlet surface 2a, the fresh air inlet surface 2b, the exhaust air outlet surface 2d and the supply air outlet surface 2c are connected in sequence, and in the plane projection perpendicular to the first direction, the projection formed by the return air inlet surface 2a, the fresh air inlet surface 2b, the exhaust air outlet surface 2d and the supply air outlet surface 2c is a quadrilateral. In other words, with the plane perpendicular to the first direction as the cross section, the cross section of the heat exchange core 2 is a quadrilateral, for example, it can be a regular quadrilateral. Compared with the heat exchange core with a hexagonal or larger cross section, the cross-sectional area of ​​the heat exchange core 2 of the present application is smaller, and the size of the heat exchange core 2 in the second direction and the third direction is smaller.

[0073] The exhaust air outlet surface 2d is opposite to the return air inlet surface 2a, and the supply air outlet surface 2c is opposite to the fresh air inlet surface 2b. In this way, the indoor airflow and the outdoor airflow cross-flow, which can improve the heat exchange efficiency. When the cross-sectional size of the heat exchange core 2 is small, the size of the heat exchange core 2 along the first direction can be used to maintain the heat exchange performance.

[0074] In one embodiment, please refer to Figure 3 , an inner surface of the housing 1 along the third direction is the bearing surface 1e, the exhaust outlet surface 2d faces the bearing surface 1e, and the angle between the exhaust outlet surface 2d and the bearing surface 1e is α, wherein 15°≤α≤30°, wherein the first direction, the second direction and the third direction are perpendicular to each other. Exemplarily, α can be 15°, 17°, 18°, 20°, 23°, 25° or 30°, etc.

[0075] The bearing surface 1e may be an inner surface of a bottom plate of the housing 1. The bottom plate may be located at a second side of the housing 1 along the third direction.

[0076] In this embodiment, the angle α between the exhaust outlet surface 2d and the bearing surface 1e is between 15° and 30°. On the one hand, the smoothness of air inlet and outlet in four directions and the effective heat exchange area of ​​the heat exchange core 2 are taken into account. The volume of the heat exchange core 2 is smaller than the heat exchange core of the fresh air equipment in the related technology, but the heat exchange efficiency is higher; on the other hand, considering that the fresh air filter 8 on the fresh air path includes a high-efficiency filter, the pressure loss is large, and the load of the fresh air motor is large, the air supply channel 102a is relatively wide and the exhaust channel 104a is relatively narrow. In this way, the load of the fresh air motor and the exhaust motor is relatively balanced, thereby improving the power of the whole machine and the life of the motor.

[0077] It can be understood that the fresh air motor is used to drive the wind wheel of the fresh air fan 3 to rotate. The exhaust air motor is used to drive the wind wheel of the exhaust air fan 4 to rotate.

[0078] As an example, the heat exchange core 2 extends along a first direction, with a plane perpendicular to the first direction as a cross section, and the cross-sectional shape of the heat exchange core 2 is a regular quadrilateral. The heat exchange core 2 includes a plurality of heat exchange medium sheets stacked along the first direction, and the size of the heat exchange medium sheets along the first direction is 1.3 mm (millimeter), and the angle α between the exhaust air outlet surface 2d and the bearing surface 1e is between 15° and 30°. Compared with the heat exchange medium sheets stacked along the third direction in the related art, the number of heat exchange medium sheets in the technical solution of the present application can be increased by about 81%. The volume of the fresh air equipment of the present application is reduced by about 51% compared with the models in the related art, but the heat exchange efficiency is higher, and the unit volume efficiency is optimized, achieving the enthalpy exchange efficiency equivalent to that of a large model within a limited volume.

[0079] In one embodiment, please refer to Figure 2 , Figure 4 and Figure 5The fresh air device includes a partition 5, which defines the space in the housing 1 as a heat exchange chamber 10a and a fan chamber 10b. The fan chamber 10b is located on one side of the heat exchange chamber 10a along the first direction. The heat exchange core 2 is located in the heat exchange chamber 10a. The fresh air fan 3 and the exhaust fan 4 are both located in the fan chamber 10b. The space in the housing 1 is divided by the partition 5 to define the flow direction of the airflow in the housing 1. The fan chamber 10b and the heat exchange core 2 are roughly T-shaped, so that the air flow in the housing 1 is smoother, achieving the effects of large air volume, low energy consumption and quietness.

[0080] The material of the partition 5 includes but is not limited to plastics and the like. It is difficult to make curved surfaces for sheet metal parts, and it is difficult to make air guide structures according to the airflow direction. The design is limited, and the thickness of the thermal insulation foam parts is usually very large and occupies a large space. Compared with sheet metal parts and thermal insulation foam parts, plastic parts have the advantages of flexible design of curved surfaces for air guide structures, relatively small thickness and do not occupy too much space.

[0081] In some embodiments, the partition 5 may be an integrally formed structure. For example, the partition 5 may be an integrally formed injection molded structure. In this way, the assembly process may be reduced.

[0082] In some embodiments, the separator 5 may also be a split structure, that is, the separator 5 may be composed of a plurality of independently manufactured individual components.

[0083] In some embodiments, the two end surfaces of the heat exchange core 2 along the first direction may abut against the shell 1 or the partition 5. For example, one end surface of the heat exchange core 2 along the first direction abuts against the shell 1, and the other end surface of the heat exchange core 2 along the first direction abuts against the partition 5. For another example, both end surfaces of the heat exchange core 2 along the first direction abut against the shell 1. For another example, see Figure 2 and Figure 4 , both end surfaces of the heat exchange core 2 along the first direction are in contact with the partition 5. In this way, airflow is prevented from flowing through the gap between the two end surfaces of the heat exchange core 2 along the first direction and the housing 1 or the partition 5.

[0084] In one embodiment, please refer to Figure 2 and Figure 3 The partition 5 includes a partition plate 51, which is connected to the heat exchange core 2 and the return air port 1a to separate the heat exchange chamber 10a into a return air channel 101a and an air supply channel 102a. The return air channel 101a is located on the first side of the air supply channel 102a along the third direction, and the return air inlet surface 2a is a partial surface of the return air channel 101a, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0085] The two surfaces of the partition plate 51 in the thickness direction may be partial surfaces of the return air channel 101a and partial surfaces of the supply air channel 102a, respectively. The return air channel 101a is used to transport the indoor airflow to the heat exchange core 2, that is, the return air channel 101a is used to transport the indoor airflow before heat exchange. The supply air channel 102a is used to transport the outdoor airflow from the heat exchange core 2, that is, the supply air channel 102a is used to transport the outdoor airflow after heat exchange. The return air channel 101a and the supply air channel 102a are independent of each other, that is, the indoor airflow of the return air channel 101a does not enter the supply air channel 102a, the outdoor airflow in the supply air channel 102a does not enter the return air channel 101a, and no gas flows between the return air channel 101a and the supply air channel 102a.

[0086] In this embodiment, the partition plate 51 separates part of the space in the heat exchange chamber 10a into a return air channel 101a and an air supply channel 102a which are independent of each other, and the structure is simple. The indoor airflow from the indoor environment enters the return air channel 101a through the return air port 1a, and the outdoor airflow is discharged through the air supply channel 102a. The return air channel 101a and the air supply channel 102a are distributed along the third direction, and the length directions of the return air channel 101a, the air supply channel 102a and the heat exchange core 2 can all be along the first direction. The sum of the dimensions of the return air channel 101a and the air supply channel 102a in the third direction can be roughly equal to the dimension of the fan chamber 10b in the third direction. The return air channel 101a, the air supply channel 102a and the fan chamber 10b are arranged in two directions respectively. In this way, without increasing the overall size of the housing 1 or the overall size of the housing 1 is relatively small, the volume of the return air channel 101a, the air supply channel 102a and the fan chamber 10b can be larger, and the resistance on the air flow path can be smaller. The indoor air flow enters the return air duct 101a along the second direction, and flows along the surface of the partition plate 51 toward the return air inlet surface 2a. The partition plate 51 plays a guiding role. The indoor air flow from the return air outlet 1a can enter the return air duct 101a without turning at a large angle, such as 90°, thereby reducing the resistance of the indoor air flow and reducing noise.

[0087] The place where the partition plate 51 is connected to the return air outlet 1a may be the surrounding part where the partition plate 51 is connected to the return air outlet 1a. For example, the partition plate 51 may be connected to the side wall where the return air outlet 1a is located, such as the first side wall. For another example, the partition plate 51 may be connected to the connection between the first side wall and the chassis. For another example, the partition plate 51 may be connected to the part of the chassis close to the first side wall.

[0088] In one embodiment, please refer to Figure 2 and Figure 3The circumferential surface of the heat exchange core 2 around the first direction includes an air supply outlet surface 2c, which is opposite to the fresh air inlet surface 2b, and is a partial surface of the air supply channel 102a. The outdoor airflow after heat exchange directly enters the air supply channel 102a through the air supply outlet surface 2c. The air supply outlet surface 2c is opposite to the fresh air inlet surface 2b, and the outdoor airflow flows roughly from the first side to the second side in the third direction, and the airflow flows smoothly with little resistance.

[0089] In one embodiment, please refer to Figure 2 , Figure 3 and Figure 8 The fan chamber 10b includes an air supply chamber 101b located on one side of the air supply channel 102a along the first direction, the fresh air fan 3 is located in the air supply chamber 101b, and the air supply chamber 101b is connected to the air supply channel 102a. Specifically, the air supply channel 102a is connected to the air supply chamber 101b near the outlet of the air supply chamber 101b along the first direction. The outdoor airflow flows in the air supply channel 102a approximately along the first direction and enters the air supply chamber 101b. In this way, the outdoor airflow does not need to turn 90 degrees, the wind path is smooth, the wind resistance is small, and the loss is small.

[0090] For ease of description, the fan housing of the fresh air fan 3 is defined as a fresh air housing. Figure 2 , Figure 3 and Figure 8 , an air inlet of the fresh air casing faces the outlet of the air supply channel 102a, and the air outlet of the fresh air casing is connected to the air supply port 1c. The airflow in the air supply chamber 101b enters the fresh air casing through the two air inlets of the fresh air casing, and then flows out to the air supply port 1c through the air outlet. The length direction of the air supply channel 102a extends along the first direction, and the airflow in the air supply channel 102a converges to the air supply chamber 101b along the first direction, and then enters the fresh air casing along the first direction, which can reduce large angles such as 90° turns during the flow of outdoor airflow, thereby reducing wind resistance, reducing eddy currents, and reducing noise.

[0091] In one embodiment, the air outlet of the fresh air housing is aligned and connected with the air supply port 1c. That is, the air outlet of the fresh air housing is similar in size and shape to the air supply port 1c. With the plane perpendicular to the second direction as the projection plane, the projection of the air outlet of the fresh air housing at least partially overlaps with the projection of the air supply port 1c.

[0092] In one embodiment, please refer to Figures 3 to 7 The partition plate 51 includes a guide plate body 511, the surface of the guide plate body 511 facing the return air outlet 1a is the return air guide surface 511a, the return air guide surface 511a includes a recessed area 511aa recessed in the direction away from the return air outlet 1a; taking the plane perpendicular to the second direction as the projection plane, the projection of the return air outlet 1a is located within the projection range of the recessed area 511aa.

[0093] In this embodiment, the return air guide surface 511a is a part of the surface of the return air channel 101a. The air volume of the indoor airflow of the return air outlet 1a is relatively large. Taking the plane perpendicular to the second direction as the projection surface, the projection of the return air outlet 1a is located within the projection range of the recessed area 511aa. The recessed area 511aa increases the space of the return air channel 101a corresponding to the return air outlet 1a, reduces the wind speed of the indoor airflow, and thus reduces the friction noise between the indoor airflow and the return air guide surface 511a.

[0094] In some embodiments, a portion of the guide plate body 511 may be bent in a direction away from the first side wall to form a recessed area 511aa. In other words, the portion of the guide plate body 511 corresponding to the recessed area 511aa occupies the space of the air supply channel 102a. In this way, it is not necessary to reduce the thickness of the portion of the guide plate body 511 corresponding to the recessed area 511aa, the structural strength of the guide plate body 511 is good, the outdoor airflow volume of the portion of the air supply channel 102a corresponding to the recessed area 511aa is small, and the required air supply space is relatively small. The portion of the guide plate body 511 corresponding to the recessed area 511aa occupies the space of the air supply channel 102a, which will not increase the resistance of the air supply channel 102a; and the effect of balancing the return air channel 101a and the air supply channel 102a can also be achieved.

[0095] In one embodiment, please refer to Figure 7 , the concave area 511aa is an arc surface. Exemplarily, the concave area 511aa can be an arc surface. Through the arc surface guidance, the probability of indoor airflow generating vortex is reduced, and the noise generated by the indoor airflow colliding with the guide plate body 511 is further reduced.

[0096] In one embodiment, please refer to Figures 3 to 7 The return air guide surface 511a includes a protruding area 511ab protruding toward the direction close to the first side wall, and the protruding area 511ab is located on the side of the recessed area 511aa close to the air supply chamber 101b along the first direction. In other words, the area of ​​the flow cross section of the return air channel 101a corresponding to the protruding area 511ab is relatively small. The indoor airflow from the return air port 1a is diverted toward the direction close to the air supply chamber 101b, and the air volume of the return air channel 101a away from the recessed area 511aa is relatively small. The relatively small area of ​​the flow cross section of the return air channel 101a corresponding to the protruding area 511ab will not excessively increase the wind speed, and will not excessively increase the friction noise between the indoor airflow and the guide plate body 511.

[0097] In some embodiments, the concave area 511aa and the convex area 511ab are smoothly transitioned. That is to say, the return air guide surface 511a is streamlined, and the indoor airflow can adhere to the return air guide surface 511a and flow to the return air inlet surface 2a from the first side of the third direction, thereby guiding and diverting the indoor airflow, reducing the vortex caused by the vertical surface in the related technology, avoiding the wind resistance caused by the existence of the corner, and having a significant noise reduction effect, and correspondingly reducing the pressure loss in the entire heat exchange process. Therefore, the heat exchange efficiency can be improved, and the resistance and energy consumption can be reduced.

[0098] In one embodiment, please refer to Figures 3 to 7 The partition 5 includes a partition plate 53, the surface of the partition plate 53 is part of the surface of the air supply chamber 101b, one end of the partition plate 53 along the third direction is connected to the partition plate 51, and part of the partition plate 53 protrudes in the direction close to the partition plate 51. The outdoor airflow is concentrated in the air supply chamber 101b and then sent to the indoor environment, and the air volume of the air supply chamber 101b reaches the maximum. The partition plate 53 is located at the junction of the air supply channel 102a and the air supply chamber 101b. The part of the partition plate 53 protrudes in the direction close to the partition plate 51, which can not only expand the volume of the air supply chamber 101b, thereby increasing the space of the air supply chamber 101b and reducing the wind speed in the air supply chamber 101b, but also reduce local eddies and airflow stagnation areas, improve gas turbulence, and achieve the effect of reducing noise.

[0099] In one embodiment, a portion of the partition plate 53 protrudes toward the direction close to the partition plate 51 to form an air guide portion, and the surface of the air guide portion constituting the air supply chamber 101b may be a flared curved surface. The airflow from the air supply channel 102a may flow smoothly along the flared curved surface of the air guide portion toward the first side of the third direction, and at the same time, the flared curved surface guides the originally blocked airflow to the fresh air blower 3, thereby reducing airflow dead angles and vortexes.

[0100] In one embodiment, please refer to Figures 3 to 7 The fresh air device includes a return air filter 7 located in the return air channel 101a, and the return air filter 7 is located between the return air port 1a and the guide plate body 511. The indoor airflow from the return air port 1a is filtered by the return air filter 7 and then guided to the heat exchange core 2 by the guide plate body 511. The return air filter 7 is used to filter the airflow, improve the cleanliness of the airflow, keep the heat exchange core 2 clean, and extend the service life of the heat exchange core 2.

[0101] The return air filter 7 can be used to filter the airflow to improve the cleanliness of the airflow. The functions of the return air filter 7 include but are not limited to removing dust, microorganisms and / or harmful gases in the air.

[0102] Exemplarily, the return air filter 7 can filter impurities such as dust, hair or paper scraps carried by the indoor airflow. The particle size of the impurities is not limited. For example, the particle size of the impurities includes but is not limited to PM1.0, PM2.5, PM10 and other particle sizes. The return air filter 7 can include but is not limited to a primary filter. The primary filter is mainly used to filter impurities larger than 5 μm (micrometer).

[0103] In some embodiments, the return air filter 7 can be fixed on the partition 5. In this way, the partition 5 can not only be used to define the flow channel, but also be used to fix the return air filter 7.

[0104] Illustratively, in some embodiments, a guide groove may be formed on the side wall of the return air channel 101a along the first direction, a buckle may be disposed in the guide groove, and the end of the return air filter 7 along the first direction is located in the guide groove and is buckled with the buckle.

[0105] In one embodiment, please refer to Figures 3 to 7 The partition plate 51 includes a guide plate body 512 and a bearing plate body 513. The bearing plate body 513 connects the guide plate body 512 and the guide plate body 511. One end of the guide plate body 512 is connected to the second side of the return air outlet 1a along the third direction. The other end of the guide plate body 512 extends obliquely in a direction away from the return air outlet 1a. The return air filter 7 is arranged on the bearing plate body 513. The included angle between the guide plate body 512 and the return air filter 7 is an obtuse angle. The guide plate body 512 is inclined toward the return air outlet 1a. The indoor airflow from the return air outlet 1a flows to the return air filter 7 through the guide plate body toward the first side of the third direction, thereby reducing the airflow blockage and the probability of vortex.

[0106] In one embodiment, please refer to Figures 3 to 7 The return air guide surface 511a includes a transition area 511ac, which is connected to the side of the protruding area 511ab close to the return air filter 7 along the second direction, and the transition area 511ac can abut the return air filter 7. For example, the transition area 511ac can abut an end surface of the return air filter 7 along the second direction. The indoor airflow from the return air port 1a is filtered by the return air filter 7 and then guided by the return air guide surface 511a. Part of the indoor airflow diffuses toward the protruding area 511ab. The transition area 511ac abuts the return air filter 7 to prevent part of the airflow from entering the narrow gap to form a vortex, thereby reducing airflow blockage.

[0107] In one embodiment, please refer to Figures 3 to 7 The partition plate 51 includes a folding plate body 514, the folding plate body 514 connects the guide plate body 511 and the heat exchange core 2, and the folding plate body 514 is perpendicular to the third direction. For example, the folding plate body 514 can be smoothly connected to the guide plate body 511. The folding plate body 514 facilitates the indoor air flow to flow to the return air inlet surface 2a.

[0108] In one embodiment, please refer to Figures 3 to 7 The partition 5 includes an isolation plate 52, which is connected to the heat exchange core 2 and the fresh air outlet 1b to separate the heat exchange chamber 10a into a fresh air channel 103a and an exhaust air channel 104a. The fresh air channel 103a is located on the first side of the exhaust air channel 104a along the third direction, and the fresh air inlet surface 2b is a partial surface of the fresh air channel 103a, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0109] The two surfaces in the thickness direction of the isolation plate 52 may be part of the surface of the fresh air channel 103a and part of the surface of the exhaust air channel 104a. The fresh air channel 103a is used to transport outdoor air to the heat exchange core 2, that is, the fresh air channel 103a is used to transport outdoor air before heat exchange. The exhaust air channel 104a is used to transport indoor air from the heat exchange core 2, that is, the exhaust air channel 104a is used to transport indoor air after heat exchange.

[0110] The fresh air channel 103a and the exhaust channel 104a are independent of each other, that is, the outdoor airflow in the fresh air channel 103a does not enter the exhaust channel 104a, the indoor airflow in the exhaust channel 104a does not enter the fresh air channel 103a, and no gas flows between the fresh air channel 103a and the exhaust channel 104a.

[0111] In this embodiment, the isolation plate 52 separates part of the space in the heat exchange chamber 10a into a fresh air channel 103a and an exhaust channel 104a which are independent of each other, and the structure is simple. The outdoor airflow from the outdoor environment enters the fresh air channel 103a through the fresh air port 1b, and the indoor airflow is discharged through the exhaust channel 104a. The fresh air channel 103a and the exhaust channel 104a are distributed along the third direction, and the length directions of the fresh air channel 103a, the exhaust channel 104a and the heat exchange core 2 can all be along the first direction. The sum of the dimensions of the fresh air channel 103a and the exhaust channel 104a in the third direction can be roughly equal to the dimension of the fan chamber 10b in the third direction. The fresh air channel 103a, the exhaust channel 104a and the fan chamber 10b are arranged in two directions respectively. Without increasing the overall size of the housing 1 or the overall size of the housing 1 is relatively small, the volume of the fresh air channel 103a, the exhaust channel 104a and the fan chamber 10b can be large, and the resistance on the airflow path can be small. The outdoor air flow enters the fresh air channel 103a along the second direction, and flows along the surface of the isolation plate 52 toward the fresh air inlet surface 2b. The isolation plate 52 plays a guiding role. The outdoor air flow from the fresh air outlet 1b can enter the fresh air channel 103a without turning at a large angle, such as 90°, thereby reducing the resistance of the outdoor air flow during flow and reducing noise.

[0112] The place where the isolation plate 52 is connected to the fresh air outlet 1b may be the surrounding part where the isolation plate 52 is connected to the fresh air outlet 1b. For example, the isolation plate 52 may be connected to the side wall where the fresh air outlet 1b is located, such as the second side wall. For another example, the isolation plate 52 may be connected to the connection between the second side wall and the chassis. For another example, the isolation plate 52 may be connected to the part of the chassis close to the second side wall.

[0113] In one embodiment, please refer to Figures 3 to 7 The circumferential surface of the heat exchange core 2 around the first direction includes an exhaust air outlet surface 2d, which is opposite to the return air inlet surface 2a, and the exhaust air outlet surface 2d is a partial surface of the exhaust passage 104a. The indoor airflow after heat exchange directly enters the exhaust passage 104a through the exhaust air outlet surface 2d. The exhaust air outlet surface 2d is opposite to the return air inlet surface 2a, and the indoor airflow flows roughly from the first side to the second side in the third direction, and the airflow flows smoothly with little resistance.

[0114] In one embodiment, please refer to Figures 2 to 4 The fan chamber 10b includes an exhaust chamber 102b located on one side of the exhaust passage 104a along the first direction, the exhaust fan 4 is located in the exhaust chamber 102b, and the exhaust chamber 102b is connected to the exhaust passage 104a. Specifically, the exhaust passage 104a is connected to the exhaust chamber 102b near the outlet of the exhaust chamber 102b along the first direction. The indoor airflow flows in the exhaust passage 104a approximately along the first direction and enters the exhaust chamber 102b. In this way, the indoor airflow does not need to turn 90 degrees, the wind path is smooth, the wind resistance is small, and the loss is small.

[0115] It should be noted that the exhaust chamber 102b and the supply chamber 101b can be independent of each other, that is, the indoor airflow in the exhaust chamber 102b does not enter the supply chamber 101b, the outdoor airflow in the supply chamber 101b does not enter the exhaust chamber 102b, and there is no gas circulation between the exhaust chamber 102b and the supply chamber 101b.

[0116] For ease of description, the fan housing of the exhaust fan 4 is defined as an exhaust housing. In one embodiment, an air flow inlet of the exhaust housing faces the outlet of the exhaust passage 104a, and the air flow outlet of the exhaust housing is connected to the exhaust port 1d. The air flow in the exhaust chamber 102b enters the exhaust housing through the two air flow inlets of the exhaust housing, and then flows out to the exhaust port 1d through the air flow outlet. The length direction of the exhaust passage 104a extends along the first direction, and the air flow in the exhaust passage 104a converges to the exhaust chamber 102b along the first direction, and then enters the exhaust housing along the first direction, which can reduce large angles such as 90° turns during the flow of outdoor air flow, thereby reducing wind resistance, reducing eddy currents, and reducing noise.

[0117] In one embodiment, the air outlet of the exhaust fan housing is aligned and connected to the exhaust port 1d. That is, the air outlet of the exhaust fan housing is similar in size and shape to the exhaust port 1d. Taking the plane perpendicular to the second direction as the projection plane, the projection of the air outlet of the exhaust fan housing at least partially overlaps with the projection of the exhaust port 1d.

[0118] In one embodiment, please refer to Figures 3 to 7 , the partition 5 includes an air diffuser 54, the surface of the air diffuser 54 is a partial surface of the exhaust chamber 102b, one end of the air diffuser 54 along the third direction is connected to the isolation plate 52, and the other end of the air diffuser 54 along the third direction extends obliquely in a direction away from the isolation plate 52. The surface of the air diffuser 54 constituting the exhaust chamber 102b can be an inclined plane. The airflow from the exhaust channel 104a can flow smoothly along the inclined plane of the air diffuser 54 toward the first side of the third direction, reducing airflow dead angles and eddy currents. The indoor airflow is concentrated in the exhaust chamber 102b and sent to the outdoor environment, and the air volume of the exhaust chamber 102b reaches the maximum. The air diffuser 54 can expand the volume of the exhaust chamber 102b, thereby increasing the space of the exhaust chamber 102b, reducing the wind speed in the exhaust chamber 102b, and achieving the effect of reducing noise.

[0119] In some embodiments, the partition 5 may further include a connecting plate and a sealing plate spaced apart along the first direction, the connecting plate connecting the partition plate 53 and the air diffuser plate 54 , and the sealing plate connecting the partition plate 51 and the isolation plate 52 .

[0120] In one embodiment, please refer to Figures 3 to 7 The fresh air device includes a fresh air filter 8 located in the fresh air channel 103a, and the isolation plate 52 includes a drainage slope 52a, which is located between the fresh air filter 8 and the fresh air outlet 1b, and the drainage slope 52a is inclined toward the fresh air outlet 1b. In other words, the angle between the drainage slope 52a and the plane where the fresh air outlet 1b is located is an acute angle. The outdoor airflow from the fresh air outlet 1b flows to the fresh air filter 8 under the guidance of the drainage slope 52a, so as to prevent the outdoor airflow from being blocked near the fresh air outlet 1b and generating vortices.

[0121] In some embodiments, the fresh air filter 8 can be fixed on the partition 5. In this way, the partition 5 can not only be used to define the flow channel, but also be used to fix the fresh air filter 8.

[0122] Exemplarily, in some embodiments, a guide groove may be formed on the side wall of the fresh air channel 103a along the first direction, a buckle may be configured in the guide groove, and the end of the fresh air filter 8 along the first direction is located in the guide groove and is buckled with the buckle.

[0123] The fresh air filter 8 can be used to filter the airflow to improve the cleanliness of the airflow. The functions of the fresh air filter 8 include but are not limited to removing dust, microorganisms and / or harmful gases in the air.

[0124] The fresh air filter 8 may include a primary filter.

[0125] The fresh air filter 8 may include a high-efficiency filter. The high-efficiency filter can achieve the effects of adsorbing PM2.5 and / or removing odors. The high-efficiency filter includes but is not limited to HEPA (High Efficiency Particulate Air Filter) and / or HAF (High Air Flow, ultra-large flow electrostatic filter).

[0126] In one embodiment, please refer to Figures 2 to 8 The heat exchange core 2 extends along the first direction, the supply air chamber 101b and the exhaust air chamber 102b are located on the same side of the heat exchange core 2 along the first direction, the first side wall of the shell 1 along the second direction forms a return air port 1a and a supply air port 1c, the second side wall of the shell 1 along the second direction forms a fresh air port 1b and an exhaust air port 1d, the return air channel 101a is located on the first side of the supply air channel 102a along the third direction, the fresh air channel 103a is located on the first side of the exhaust air channel 104a along the third direction, the supply air chamber 101b is located on one side of the supply air channel 102a along the first direction, and the exhaust air chamber 102b is located on one side of the exhaust air channel 104a along the first direction.

[0127] The return air channel 101a and the supply air channel 102a are both located on the same side of the heat exchange core 2 along the second direction. The fresh air channel 103a and the exhaust air channel 104a are both located on the same side of the heat exchange core 2 along the second direction. In this way, the sum of the dimensions of the supply air chamber 101b and the exhaust air chamber 102b along the second direction can be close to the sum of the dimensions of the return air channel 101a, the fresh air channel 103a and the heat exchange core 2 along the second direction. The dimensions of the supply air chamber 101b along the third direction, the exhaust air chamber 102b along the third direction, and the heat exchange core 2 along the third direction can be roughly the same, and other air ducts can also be designed according to the above principles. In this way, there is almost no useless area in the space inside the outer shell 1, and the dimensions of each air duct in the outer shell 1 are relatively large.

[0128] Regarding indoor airflow: the indoor airflow enters the housing 1 from the return air port 1a, flows along the first airflow path X1 in the housing 1, and then is discharged to the outside from the exhaust port 1d, that is, the first airflow path is the return air path of the indoor airflow. Specifically: the indoor airflow from the return air port 1a enters the return air channel 101a and flows in a curve toward the first side of the third direction, and enters the heat exchange core 2 through the return air inlet surface 2a and flows to the second side. The indoor airflow after heat exchange enters the exhaust channel 104a through the exhaust air outlet surface 2d, and finally enters the exhaust chamber 102b and is discharged through the exhaust port 1d. The indoor airflow flows linearly during the flow process, with almost no airflow dead corners, a smooth air path, and low wind resistance.

[0129] Regarding outdoor airflow: the outdoor airflow enters the housing 1 from the fresh air inlet 1b, flows along the second airflow path X2 in the housing 1, and is then discharged to the room from the air supply port 1c. In other words, the second airflow path is the fresh air path for the outdoor airflow. Specifically: the outdoor airflow from the fresh air inlet 1b enters the fresh air channel 103a and flows in a curve toward the first side of the third direction, and enters the heat exchange core 2 through the fresh air inlet surface 2b and flows to the second side. The outdoor airflow after heat exchange enters the air supply channel 102a through the air supply outlet surface 2c, and finally enters the air supply chamber 101b and is discharged through the air supply port 1c. The outdoor airflow flows linearly during the flow process, with almost no airflow dead angles, a smooth air path, and low wind resistance.

[0130] In some embodiments, the size of the fresh air device along the first direction can be 510mm to 530mm, the size of the fresh air device along the second direction can be 580mm to 695mm, and the size of the fresh air device along the third direction can be 230mm to 240mm. The heat exchange core 2 extends along the first direction, and the fresh air fan 3 and the exhaust fan 4 are arranged along the second direction and are both located on the same side of the heat exchange core 2 along the first direction. The air volume of the fresh air device provided in this embodiment can be between 250 and 350. In this way, by simplifying the structure and reducing parts, improving space utilization, and ensuring the performance of air volume, efficiency and power, the volume is reduced by about 50% to 60% compared with the existing models with the same performance.

[0131] In the description of the present application, the description with reference to the terms "in one embodiment", "in some embodiments" or "exemplary" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0132] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A fresh air device, characterized in that: include: shell; A heat exchange core is located in the shell, and the heat exchange core extends along a first direction; A fresh air fan is located in the housing; The exhaust fan is located in the shell, the fresh air fan and the exhaust fan are arranged along the second direction, and are both located on the same side of the heat exchange core along the first direction, and the first direction and the second direction are perpendicular to each other.

2. The fresh air device according to claim 1, characterized in that: The two side walls of the shell opposite to each other along the second direction are respectively formed with a return air outlet and a fresh air outlet. The circumferential surface of the heat exchange core surrounding the first direction includes a return air inlet surface and a fresh air inlet surface. The return air inlet surface is located on the side of the fresh air inlet surface close to the return air outlet.

3. The fresh air device according to claim 2, characterized in that: The fresh air inlet surface is inclined toward the fresh air outlet.

4. The fresh air device according to claim 2, characterized in that: The fresh air device includes a partition, which defines the space in the shell into a heat exchange chamber and a fan chamber. The fan chamber is located on one side of the heat exchange chamber along a first direction, the heat exchange core is located in the heat exchange chamber, and the fresh air fan and the exhaust fan are both located in the fan chamber.

5. The fresh air device according to claim 4, characterized in that: The partition includes a partition plate, which is connected to the heat exchange core and the return air outlet to separate the heat exchange chamber into a return air channel and a supply air channel, the return air channel is located on the first side of the supply air channel along the third direction, and the return air inlet surface is a partial surface of the return air channel, wherein the first direction, the second direction and the third direction are perpendicular to each other.

6. The fresh air device according to claim 5, characterized in that: The circumferential surface of the heat exchange core surrounding the first direction includes an air supply outlet surface, the air supply outlet surface is opposite to the fresh air inlet surface, and the air supply outlet surface is a partial surface of the air supply channel.

7. The fresh air device according to claim 5, characterized in that: The fan cavity includes an air supply chamber located on one side of the air supply channel along the first direction, the fresh air fan is located in the air supply chamber, and the air supply chamber is connected to the air supply channel.

8. The fresh air device according to claim 4, characterized in that: The partition includes an isolation plate, which is connected to the heat exchange core and the fresh air outlet to separate the heat exchange chamber into a fresh air channel and an exhaust air channel, the fresh air channel is located on the first side of the exhaust air channel along the third direction, and the fresh air inlet surface is a partial surface of the fresh air channel, wherein the first direction, the second direction and the third direction are perpendicular to each other.

9. The fresh air device according to claim 8, characterized in that: The circumferential surface of the heat exchange core surrounding the first direction includes an exhaust air outlet surface, the exhaust air outlet surface is opposite to the return air inlet surface, and the exhaust air outlet surface is a partial surface of the exhaust passage.

10. The fresh air device according to claim 8, characterized in that: The fan cavity includes an exhaust chamber located on one side of the exhaust channel along the first direction, the exhaust fan is located in the exhaust chamber, and the exhaust chamber is connected to the exhaust channel.

11. The fresh air device according to claim 1, characterized in that: A return air inlet and an air supply inlet are formed on one side wall of the shell along the second direction, and a fresh air inlet and an exhaust air inlet are formed on the other side wall of the shell along the second direction. The airflow outlet of the fresh air fan is connected to the air supply inlet, and the airflow outlet of the exhaust fan is connected to the exhaust inlet.

12. The fresh air device according to claim 11, characterized in that: The fresh air device includes a control device arranged outside the shell, and the control device is located on a side wall of the shell along the second direction.

13. The fresh air device according to claim 1, characterized in that: The circumferential surface of the heat exchange core surrounding the first direction includes a return air inlet surface, a fresh air inlet surface, an exhaust air outlet surface and a supply air outlet surface, the exhaust air outlet surface is opposite to the return air inlet surface, the supply air outlet surface is opposite to the fresh air inlet surface, and the return air inlet surface, the fresh air inlet surface, the exhaust air outlet surface and the supply air outlet surface are connected in sequence.

14. The fresh air device according to claim 13, characterized in that: An inner surface of the shell along the third direction is a bearing surface, the exhaust outlet surface faces the bearing surface, and the angle between the exhaust outlet surface and the bearing surface is α, 15°≤α≤30°, wherein the first direction, the second direction and the third direction are perpendicular to each other.

15. The fresh air device according to any one of claims 1 to 14, characterized in that: An axis of the fresh air fan and an axis of the exhaust air fan both extend along a first direction.

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